Mine hoist control



Oct. 24, 1933. Isms 1,931,940

MINE HOI ST CONTROL Filed May 7, 1932 4 Sheets-Sheet l A ilorney Oct. 24, IS|KES MINE HOIST CONTROL Filed May 7, 1932 4 Sheets-Sheet 2 Q Inventor I gmm Oct. 24, 1933. v. SIKES MINE HOIST CONTROL 4 Sheebs-Sheet 3 Filed May 1932 Inventor Q By @mr; 42021.. I Aliorney Oct. 24, 1933.- v. SIKES 1,931,940

MINE HOI ST CONTROL Filed May 7, 1932 4 Sheets-Sheet 4 J/ OW R Inventor A tlorney Patented Oct. 24, 1933 UNITED STATES MINE HOIST CONTROL Virgil Sikes, Commerce, Okla.

Application May 7, 1932. Serial No. 609,969 I 1 Claim.

This invention appertains to new and useful improvements in hoist controls and more particularly to a semi-automatic electric control which has as its principal object, the provision of means for stopping the hoist at a predeter- -mined elevation without manual initiative.

Another very important object of the invention is to provide a novel electric hoist control for preventing excessive speed.

Still another'important object of the invention is to provide indicating means whereby the operator can easily determine the position of the hoist bucket in the shaft.

' Other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:-

Figure 1 represents a diagrammatic view of the hoist operating mechanism and control, disclosing the, mechanical elements involved.

I Fig.2 represents a diagrammatic view disclosing the 'electricalelements involved and the connections between the same.

Fig.3 represents a sectional View taken substantially on line 33 of Fig. 1.

Fig. 4 represents a fragmentary detailed sectional view of the feedable contact carrier shown in Fig. 1.

Fig. 5 represents a vertical sectional view taken substantially on line 5-5 of Fig. 1.

Fig. 6 represents a front elevational view of the substance shown in Fig. 5 and enlarged over that shown in the lower portion of Fig. 1.

Fig. '7 represents a perspective view of the trip member for the air line valve.

Referring to the drawings wherein like numerals designate like parts, it can be seen in Fig. 1, that numeral 5 represents the hoist drum with numeral 6 denoting the hoist cable wound 13 9 thereon. The drum 5 is suitably'secured to the shaft '7 and has its ends journaled through the bearing tion the supports 9-9. These supports 9-9 are mounted on one end portion of the platform or floor 10. One end of the shaft '7 is equipped with a brake drum around which the brake band 11 is disposed, while the opposite end of the shaft '7 is provided with a sprocket wheel 12.

Supported in a suitable manner above the platform is the panel 13 having a plurality of horizontally spaced pairs of contacts, each pair being denoted by numerals 14-15.

An elongated guide rod 16 has upwardly disposed end portions which are disposed laterally as at 1'7 and project through openings in the panel 13. These end portions 1'? have nuts 18 thereon which serve to space the rod 16 from the panel 13 whenthey are properly engaged against the panel 13 as in the manner shown in Fig. 3.

Slidable on the rod 16 to any desired adjusted position, is the carrier 19 for the contact, fingers 20-21 which are of suitable spring material.

Mounted upona shelf 22 on the panel 13 are the electric lamps 23-24, 25, 26, and as many more as are desired or needed, one lamp being provided for each pair of contacts 14-15. p Adjacent the panel 13 is an elongated screw 2'7 which has its smooth end disposed through the bearings 28-29. One end of the screw 27 is provided with a sprocket wheel 30 and as is clearly shown in Fig. 1, a sprocket chain 31 is trained over the sprocket wheels 12 and 30.

Supports 32-33 at the ends of the screws 37, serve tosupport the tie rod 34 which extends through the apertured head 35 of the arm 36 which extends upwardly from the the nut 38.

Rockable on the nut 38 is the contactor 39, one end of which carries the contact block 40, which is capable of bridging the spring contact fingers 20-21 (see Figs. 1 and 3). Depending members 41-42 at the ends of the screw 2'7 support the horizontal rod 43 so that the same can be operated by the lever 44, this rod 43 being secured to 5 the remaining end of the contact 39.

As can be observed in Fig. 3, the arm 36 is provided with alaterally extending member 45 which carries a contact spring 46 on its extremity for Wiping engagement with the contacts 14-15 of 99 the several groups.

As can be clearly seen in Fig. 1, numeral 47 represents a rotary shaft whichis connected by the connecting means 48 to the band 11 whereby the brake band can be operated. Numeral 49 535 represents a hand lever for operating the shaft 47, while in this View of the drawings, the automatic means is also disclosed.

As is clearly shown in Fig. 5, the shaft 47 has a lever 50 secured thereto and projecting laterally 51. thereof. The extremity of this lever 50 is provided with a pintle 51 which projects into the slot 52 of the link 53.

The lower end of this link 53 is connected to one end of the lever 54 which is carried by the shaft 55 on the support 56. Depending from the hub of this lever 54 is the bar 5'7 which has a piston rod 58 pivotally connected thereto as at 59. The piston rod 58 has a piston 60 secured thereto collar 37 on 23,24 and 25 are connected in parallel.

and operates in the air cylinder 61 which has a compressed air feed line 62 leading thereto.

An additional lever 63 is secured to the shaft and has the upper end of a turn buckle 64.- pivotally connected thereto. The lower end of the turn buckle 64 is pivotally connected to the foot 65 against which the lug 66 on the foot operated shaft 6'7 is operative, the shaft 67 being provided with a foot pedal 63.

It can be seen that the shaft 4'7 can be operated manually by the hand lever 49 (see Fig. l) with the pin 51 operating in the slot 52 for when the apparatus is automatically operated, operation of the brake drum is effected through the link 53.

In the compressed air feed line 62 is the control valve 68 having a lever 69 for operating the same. This lever 69 is normally tensioned to the valve opened position by the spring '70.

As is clearly shown in Fig. l, and also shown in Fig. '7, numeral '71 represents a bell crank which has a reduced end portion defining a shoulder '72 which rests against the free end of the lever 69 against the tension of the spring '70 to maintain the valve 68 normally closed. Numeral '72 represents a solenoid including the armature '73 which is connected to the remaining end of the bell crank '71 by the pin and slot connection '74.

Numeral '75 represents a small pulley on the end of the screw 2'7 adjacent the sprocket wheel 30 which drives a belt '76 trained over the smaller pulley '77 on the shaft '78 which is geared as at '79 to rotate the governor which raises or lowers the contactor 81 in accordance with the speed of rotation thereof.

As is clearly shown in Fig. 2, this contactor 81 can operate away from the contacts 8283 when the governor travels at excessive speed. Referring to the diagrammatic view in Fig. 2, it can be seen that numeral 84 represents the signal light-circuit in which the aforementioned lamps These lamps are normally maintained ole-energized by the open circuit gap at their corresponding contacts 14-15.

Numeral 85 generally refers to the circuit breaker of the motor circuit generally referred to by numeral 86. As is shown in Fig. 2, the contacts 8283 associated with the governor 80 are also in the motor circuit and this motor circuit can also be controlled by the contactor 39 operated by the screw 2'7 when the same is brought into bridging relation with the contact fingers 2021.

Obviously, when the motor circuit is opened by either the governor 80, or the circuit breaker 85 and solenoid '72 are energized when the contactor 39 bridges the contact fingers 20 and 21, the brake band 11 is operated by the release of air to the cylinder 61. However, in the manual operation of the brake 11 by the lever 49, the automatic brake operating means is not affected.

It can now be seen, that the operator of the hoist can easily ascertain at what position the hoist is, in the shaft by noticing the lamps 23 to 26 inclusive and furthermore, the operator can limit the upward travel of the hoist by setting the contact carrier 19 at the desired position on the rod 16, thus preventing the hoist from rising into the drum room and perhaps causing damage. However, by operating the lever 88 on the platform 10 which is connected as at 89 to the lever 44, the contactor 39 can be set to disengage the fingers 2021 so that the hoist can rise beyond its ordinary limit when desired.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having thus described my invention, what I claim as new is:-

In combination, a hoist drum, a travelling contactor, a motor circuit including a motor for operating the drum, a circuit breaker, said circuit 

